• Title/Summary/Keyword: Chemical process industry

Search Result 681, Processing Time 0.027 seconds

Chemical composition of protein concentrate prepared from Yellowfin tuna Thunnus albacares roe by cook-dried process

  • Lee, Hyun Ji;Park, Sung Hwan;Yoon, In Seong;Lee, Gyoon-Woo;Kim, Yong Jung;Kim, Jin-Soo;Heu, Min Soo
    • Fisheries and Aquatic Sciences
    • /
    • v.19 no.3
    • /
    • pp.12.1-12.8
    • /
    • 2016
  • Roe is the term used to describe fish eggs (oocytes) gathered in skeins and is one of the most valuable food products from fishery sources. Thus, means of processing are required to convert the underutilized yellowfin tuna roes (YTR) into more marketable and acceptable forms as protein concentrate. Roe protein concentrates (RPCs) were prepared by cooking condition (boil-dried concentrate, BDC and steam-dried concentrate, SDC, respectively) and un-cooking condition (freeze-dried concentrate, FDC) from yellowfin tuna roe. The yield of RPCs was in the range from 22.2 to 25.3 g/100 g of roe. RPCs contained protein (72.3-77.3 %), moisture (4.3-5.6 %), lipid (10.6-11.3 %) and ash (4.3-5.7 %) as the major constituents. The prominent amino acids of RPCs were aspartic acid, 8.7-9.2, glutamic acid, 13.1-13.2, and leucine, 8.5-8.6 g/100 g of protein. Major differences were not observed in each of the amino acid. K, S, Na, and P as minerals were the major elements in RPCs. No difference noted in sodium dodecyl sulfate polyacrylamide gel electrophoresis protein band (15-100 K) possibly representing partial hydrolysis of myosin. Therefore, RPCs from YTR could be use potential protein ingredient for human food and animal feeds.

SO2 Adsorption Characteristics by Cellulose-Based Lyocell Activated Carbon Fiber on Cu Additive Effects (셀룰로오스계 라이오셀 활성탄소섬유의 구리 첨착에 의한 SO2 흡착특성 변화)

  • Kim, Eun Ae;Bai, Byong Chol;Lee, Chul Wee;Lee, Young-Seak;Im, Ji Sun
    • Applied Chemistry for Engineering
    • /
    • v.26 no.4
    • /
    • pp.394-399
    • /
    • 2015
  • In this study, the Cu catalyst decorated with activated carbon fibers were prepared for improving $SO_2$ adsorption properties. Flame retardant and heat treatments of Lyocell fibers were carried out to obtain carbon fibers with high yield. The prepared carbon fibers were activated by KOH solution for the high specific surface area and controlled pore size to improve $SO_2$ adsorption properties. Copper nitrate was also used to introduce the Cu catalyst on the activated carbon fibers (ACFs), which can induce various reactions in the process; i) copper nitrate promotes the decomposition reaction of oxygen group on the carbon fiber and ii) oxygen radical is generated by the decomposition of copper oxide and nitrates to promote the activation reaction of carbon fibers. As a result, the micro and meso pores were formed and Cu catalysts evenly distributed on ACFs. By Cu-impregnation process, both the specific surface area and micropore volume of carbon fibers increased over 10% compared to those of ACFs only. Also, this resulted in an increase in $SO_2$ adsorption capacity over 149% than that of using the raw ACF. The improvement in $SO_2$ adsorption properties may be originated from the synergy effect of two properties; (i) the physical adsorption from micro, meso and specific surface area due to the transition metal catalyst effect appeared during Cu-impregnation process and ii) the chemical adsorption of $SO_2$ gas promoted by the Cu catalyst on ACFs.

Novel Biocide Controls Biofilm Formation without Adversely Affecting the Papermaking Process

  • Bharti, Shashank;Kim, Hyung-Ju;Kim, Ik-Dong
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
    • /
    • 2006.06a
    • /
    • pp.67-71
    • /
    • 2006
  • Strong oxidizing biocides are commonly used to control biofilm formation in alkaline papermaking systems. However, paper streams contain many substances that react with or consume oxidizers (e.g., fiber and starch, Therefore, to achieve effective microbiological control, the oxidizer must be overfed to overcome the effect of these substances. When dosed in this manner, the oxidizer can cause many unwanted reactions and adverse side effects, including the consumption of costly papermaking additives increased corrosion rates, and reduced felt life. Some oxidizers also contribute to the formation of halogenated organic compounds. When used for biofilm control, strong oxidizers can cause more problems than they remedy. A patented biocide that effectively controls biofilm without the adverse side effects associated with strong oxidizing biocides is available from Hercules. $Spectrum^{(R)}$ XD3899 Ammonium Bromide Technology, which can be described as a mild oxidizer, is currently used on more than 300 machines globally and has resulted in numerous production and/or machine efficiency records since its introduction in 2001.

  • PDF

Cleaner Production Option in a Food(Kimchi) Industry

  • Choo, Kwang-Ho;Lee, Chung-Hak
    • Korean Membrane Journal
    • /
    • v.2 no.1
    • /
    • pp.1-8
    • /
    • 2000
  • In Kimchi (a salt-pickled and fermented food) manufacturing industry, the process of brining and rinsing the raw vegetable produces a vast amount of wastewater of high salinity. Instead of expensive and low-efficient conventional treatment system, brining wastewater reuse system was developed using hybrid chemical precipitation/microfiltration. In the microfiltration of chemically treated brining wastewater, comparison of flux, backwashing frequency and energy consumption was made between dead-end and crossflow filtration mode. The optimum location of neutralization step in this system was also discussed in connection with the microfiltration performance. The quality test of Kimchi prepared by the reuse system confirmed the new approach was successful in terms of water/raw material(salt) saving and wastewater reduction.

  • PDF

Cleaner Production Option in a Food (KIMCHI) Industry

  • Choo, Kwang-Ho;Lee, Chung-Hak
    • Proceedings of the Membrane Society of Korea Conference
    • /
    • 1999.04b
    • /
    • pp.1-12
    • /
    • 1999
  • In Kimchi (a salt-pickled and fermented food) manufacturing industry, the process of brining and rinsing the raw vegetable produces a vast amount of wastewater of high salinity. Instead of expensive and low-efficient conventional treatment system, brining wastewater reuse system was developed using hybrid chemical precipitation / microfiltration. In the microfiltration of chemically treated brining wastewater, comparison of flux, backwashing frequency and energy consumption was made between dead-end and crossflow filtration mode. The optimum location of neutralization step in this system was also discussed in connection with the micro filtration performance. The quality test of Kimchi prepared by the reuse system conformed the new approach was successful in terms of water/raw material (salt) savings and wastewater reduction.

  • PDF

Effect of Deinking Agent Wettability on the Alkaline Deinking of Mixed Office Wastepaper (백상지 혼합고지의 알칼리 탈묵과 탈묵제 젖음성의 영향)

  • Yoon, Byung-Tae;Kim, Young-Ho;Kim, Chul-Woong;Seo, Young-Bum;Jeon, Yang
    • Journal of Korea Technical Association of The Pulp and Paper Industry
    • /
    • v.35 no.4
    • /
    • pp.34-41
    • /
    • 2003
  • The effect of wettability of deinking agents which formed with various nonionic surfactants against the pulp fibers and ink particles were studied, And the effect of flotation processes on the deinking were also investigated. The wettabilities of the deinking agents against the water and ink particles were measured by Washburn tube and sessile drop techniques, respectively. As the water absorption increased (i.e., hydrophilicity increased), the ink removal increased, which indicates that the ink removal is strongly affected by the detachment process due to the swelling of the pulp. Also, when the contact angle of air/ink/deinking agent increased, the hydrophobicity of the ink particles increased, the efficiency of the ink removal and the brightness increased.

Modification methods of polyethersulfone membranes for minimizing fouling - Review

  • Sathish Kumar, R.;Arthanareeswaran, G.;Paul, Diby;Kweon, Ji Hyang
    • Membrane and Water Treatment
    • /
    • v.6 no.4
    • /
    • pp.323-337
    • /
    • 2015
  • Membrane Fouling was considered as major drawback in various industrial applications. Thus, this paper reviews the surface modification of polyethersulfone (PES) membranes for antifouling performance. Various modification techniques clearly indicate that hydrophilicity has to improve on the PES membrane surface. Moreover, the mechanism of fouling reduction with corresponds to various modification methods is widely discussed. Incorporation of hydrophilic functional groups on PES membrane surface enhances the surface free energy thereby which reduces the fouling. Characterization techniques adopted for the surface modified membranes was also discussed. These studies might be useful for the other researchers to utilize the modification technique for the applications of waste water treatment, chemical process industry and food industry.

Development of Machine Learning-Based Platform for Distillation Column (증류탑을 위한 머신러닝 기반 플랫폼 개발)

  • Oh, Kwang Cheol;Kwon, Hyukwon;Roh, Jiwon;Choi, Yeongryeol;Park, Hyundo;Cho, Hyungtae;Kim, Junghwan
    • Korean Chemical Engineering Research
    • /
    • v.58 no.4
    • /
    • pp.565-572
    • /
    • 2020
  • This study developed a software platform using machine learning of artificial intelligence to optimize the distillation column system. The distillation column is representative and core process in the petrochemical industry. Process stabilization is difficult due to various operating conditions and continuous process characteristics, and differences in process efficiency occur depending on operator skill. The process control based on the theoretical simulation was used to overcome this problem, but it has a limitation which it can't apply to complex processes and real-time systems. This study aims to develop an empirical simulation model based on machine learning and to suggest an optimal process operation method. The development of empirical simulations involves collecting big data from the actual process, feature extraction through data mining, and representative algorithm for the chemical process. Finally, the platform for the distillation column was developed with verification through a developed model and field tests. Through the developed platform, it is possible to predict the operating parameters and provided optimal operating conditions to achieve efficient process control. This study is the basic study applying the artificial intelligence machine learning technique for the chemical process. After application on a wide variety of processes and it can be utilized to the cornerstone of the smart factory of the industry 4.0.

Process Parameter Control of Arc Melting Process for Ti3SiC2 MAX Phase Synthesis (Ti3SiC2 MAX Phase 합성을 위한 Arc Melting 공정 제어)

  • Nou, Chang Wan;Kim, Byeong Guen;Bae, Sang Hyun;Choi, Soon-Mok
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.33 no.6
    • /
    • pp.515-520
    • /
    • 2020
  • The Ti3SiC2 MAX phase was synthesized by arc-melting process under three different processing times. We confirmed that the reaction between the TiCX phase and Ti-Si liquid phase is important for the synthesis of the Ti3SiC2 MAX phase. Results suggest that the Ti3SiC2 MAX phase decomposed when the arc-melting time was greater than 80s. Herein, we aim to determine the detailed parameters for the reported arc-melting process, which can provide useful insights on the synthesis of the Ti3SiC2 MAX phase by arc-melting process. Furthermore, we compared the electrical characteristics and densities of the three samples.

Next Generation Technology to Minimize Ecotoxicity and to Develop the Sustainable Environment: White Biotechnology

  • Sang, Byoung-In;Ryu, Jae-Chun
    • Molecular & Cellular Toxicology
    • /
    • v.1 no.3
    • /
    • pp.143-148
    • /
    • 2005
  • This review aims to show that industrial sustainable chemistry, minimizing or reducing the ecological impacts by the chemicals, is not an emerging trend, but is already a reality through the application of 'White Biotechnology' such as 'green' chemistry and engineering expertise. A large number of current industrial case studies are presented, as well as new developments from the chemical industry. The case studies cover new chemistry, new process design and new equipment. By articulating the requirements for industrial application of sustainable chemistry, this review also seeks to bridge any existing gap between academia and industry regarding the R & D and engineering challenges needed to ensure green chemistry research enables a more sustainable future chemical industry considering eco-toxicological impacts.